公衆衛生
Rachel K Morgan1, Evelyn K Matei1, Tomoko Ishikawa1
1University of Michigan, Ann Arbor, MI, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
まとめ
周産期の鉛(Pb)曝露は、脳と血液の代謝産物を変化させ、酸化ストレス、炎症、脂質代謝に影響を与え、メスのマウスでより大きな影響が観察されました。これらの発見は、Pb曝露および神経変性疾患リスクの潜在的なバイオマーカーを示唆しています。
科学分野:
- 神経科学
- 毒性学
- 代謝学
背景:
- 神経毒性物質である鉛(Pb)への発達曝露は、認知症の原因となる要因と疑われています。
- 認知症は神経学的および代謝的変化を伴いますが、Pbの特定の代謝への影響は不明です。
- この研究では、周産期曝露後の脳と血漿におけるPbの代謝への影響を調査します。
研究 の 目的:
- 周産期鉛曝露後のマウスの血漿および脳皮質の代謝プロファイルを評価すること。
- 鉛曝露による代謝変化における性差を特定すること。
- 鉛曝露および神経変性疾患の潜在的な代謝バイオマーカーを探索すること。
主な方法:
- 周産期にメスマウスを鉛(32ppm)または対照水に曝露させた。
- 生後21日目に仔のマウスの血漿および脳皮質を採取した。
- 超高性能液体クロマトグラフィー-質量分析(UPLC-MS)および二元配置分散分析を用いた代謝プロファイリング。
主要な成果:
- 鉛曝露は、特に女性において、皮質および血漿中の酸化ストレスマーカーを増加させました。
- 鉛は、皮質(減少)と血漿(増加)の間で炎症マーカーを異なって変化させました。
- 鉛曝露は、両方の皮質および血漿中の脂肪酸代謝産物を上昇させ、女性でより強い影響が見られました。
結論:
- 周産期鉛曝露は、酸化ストレス、炎症、脂質代謝に関連する皮質および血漿の代謝産物を著しく変化させます。
- 代謝変化は、一般的にメスマウスでより顕著でした。
- キヌレニンおよび脂肪酸代謝産物は、鉛曝露および関連する神経変性効果のバイオマーカーとして有望です。
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